Tunnel-bar



N0. 751,289. l PATENTED FEB. 2, 1904.

I G. W. JAKSON.

TUN-NEL, BAR.

APPLICATION FILED MAR. 30, 1901.

TUNNEL BAR. .APPLIUATION FILED MAR. ao, 1901.

N0 MODEL. 2 SHEETS-SHEET 2.

HUI I j fue Nunsxs #ziens co. Pupmujmo, wAsHmai'oN, n n,-

' UNI-TED STATES Patented February 2, 1904.

PATENT QEEICE.

GEORGE w. JACKSON, OE CHICAGO, ILLINOIS.

TUNNEL-BAH SPECIFICATION forming part of Letters Patent No. 7151,289, dated February 2, 1904. i Application led March 30, 1901. Serial No. 53,688. (No model.)

Beit known that I, GEORGE W. JACKSON, a` citizen of the United States, and a resident of the cityof Chicago, in the county of Cook point of operation and receive the material directly, so as to obviate rehandling.

It is also my object to provide simple and 'l posltive-acting means whereby a wide variation in the range of operation of the bar may be quickly effected.

I have illustrated my invention in the ac companying drawings, in which- Figure 1` is a side view of my invention, showing a car underneath the mechanism.

Fig. 2 is a top view thereof.I Fig. 3 is an end view thereof.

Like letters refer to like parts in the several figures. f

The tunnelingbar ct is composed of the channel-irons Z' and Z2 and the top and bottom plates Z3 and a4. The said top and bottom plates Z3 and are riveted to the said irons or secured in any preferred manner.

Mounted in one end of the bar Z is a solid turned bar a5, which is rmly secured to the irons d and Z2 by rivets and upon which the drilling mechanism is adapted to be mounted.

Mounted upon and secured to the top plate Z3 is a rack a. The said rack Z6 is adapted to be engaged by the pinions and The pinions b and Z are keyed or xedly attached to the shaftsb2 and b3, respectively. The shaft Z2 is journaled in the bearings b4 b4, and the shaft Zasy is journaled in the bearings b5 b5.

Mounted upon and secured to the' bottom plate Z4 is a rack c. The said rack c is adapted to be engaged by the pinions c' and o2.

the aforesaid structure.

The pinions c and 02 are keyed or Xedly attached to the shafts@3 and c4, respectively. The shaft c3 is journaled in the bearings e5 c5, andthe shaft c4 is journaled in the bearings c c6. ArIhe said bearings c5 c5 and Zf b4 are 'adapted to slide up or down on the uprights or supports Z OZ. rIhe said uprights Z UZ are 'mounted on the cross-beam Z and form the f supports for the cross-beam Z2. The bearings 05. c5 are adapted to rest on the heads of vthe jack-screws Z3 Z3 and to act as cups for said jack-screws. The cross-beam OZ is provided with two bores, into which the jackscrews Z3 Z3 are threaded. rIhe jack-screws Z4L Zi are threaded into bores in the crossbeam Z2, andthe heads of said jack-screws .are adapted to engage the bearings Z4 Z4,

which bearings Z Z act as cups for the said jack-screws. The function of these jackscrews Z3 Z3 and Z4 Z4 is to allow bar Z to be raised or lowered, or they maybe used to force the pinions together, thereby causing the axles of the same to bind and prevent the bar from projecting or retracting.

Threaded into bores in the opposite ends of the cross-beam Z are the jack-screws Z 5 di. The opposite or lower ends of saidjack-screws are adapted to work in the cups Z7 Z 7. The

said cups are blocked up on any suitable foundations on both sides of the car-track,

be run between the jack-screws Z5Z5 and under the crossrbeam UZ. y

The ends of the cross-beam Z2 arep'rovided with bores into which are threaded the jack-- screws`Z6 Z The said jack-screws, are adapt-r ed to be jammed against the roof of the tunnel. Thus when the cups Z 7 Z 7 have been blocked up and the jack-screws Z 5 Z5 jacked up, thereby raising the frame composed of Vwhich-is adapted to be laid so that a car may IOO the beams Z' and @Z2 and the uprights Z and Z isv joined to the first-mentioned frame by four gil-ders orj oists c3 e3, &c. two of the said girders extending between and being secured to the cross-beams (Z2 and e2, respectively, and the other two girders extending between and being secured to the cross-beams eZ and c, respectively.

Threaded into bores in the opposite ends of the cross-beam eA are the jack-screws e4 e4. The opposite or lower ends of said jack-screws are adapted to work in the cups e" e5. The said cups are blocked up on any suitable foundations on both sides of the car-track, which is adapted to be laid so that a car may be run between the jack-screws e4 e4 and under the cross-beam e. The opposite end of the frame being similarly supported by the crossbeams cZ, jack-screws Z5 (Z5, and cups (Z7 ZZ?, as heretofore explained, it will be seen that there is a free opening or passage-way extending the full length of the frame and that a car r may be run through the said passageway and clear up to the face of the tunnel. The ends of the cross-beam c2 are provided .with bores into which are threaded the jackscrews e eG. The said screws are adapted to be jammed against the roof of the tunnel and perform the same function as the jackscrews CZ (Z6.

The bearings c c are adapted to rest on the heads of the jack-screws ff and to act as cups for said jack-screws. The cross-beam e is provided with two bores into which the jackare threaded into bores in the cross-beam e2,

,and the heads of said jack-screws are adapted to engage the bearings Z5 Z5, which bearings Z5 Z5 act as cups for the said jack-screws. The function of' these jack-screws ff and f f is to allow the bar a to be raised or lowered as it passes between the pinions Z and c2.

By working the jack-screws Zi eZ1 and Z3 CZ3 simultaneously and in the same direction with the jack-screwsff and f f the tunnel-bar o is given a vertical movement. The bar a also has a horizontal movement, due to its being mounted on the pinions Z c' Z/ c2, which are adapted to rotate in suitable bearings. The bar a may also be operated at an angle to the horizontal by lowering the jack-screws ff and f' f and by raising the jack-screws (Zi (ZL and cZ3 (Z3, and vice versa.

Another feature of this invention embodies the method of removing the tunnel-bar and its supports with the drilling-machine which is mounted on the end of the tunnelbar when it is desired to blast. This is accomplished by running the tunnel-bar back until it is balanced and then letting the' frames which carry the tunnel-bar down upon the car L, the beams CZ and c resting on the top of the car and running the car, with the apparatus on the top of it, back in the tunnel to a sufiicie'nt distance so as not to be injured by the concussion of the explosion. In this manner it will be noticed that the whole apparatus may be handled easily and with very little expenditure of energy. v

I do not wish to be understood as confining myself to the construction as shown in the drawings and described in the specification, as the different parts may be subjected to various modifications and still not depart from the spirit of my invention.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a tunneling device, the combination with a frame, of a tunnel-bar, four independently-adjustable supports for said bar mounted on said frame, said supports controlling the angle of the incline of said bar, and supports for holding the frame in position, substantially as described.

2. In a tunneling device, the combination with a tunnel-bar having racks upon its upper and lower edges, of a frame, means carried by said frame upon which said bar is fulcrumed, a pinion adjustably mounted in said frame to engage upon the upper edge of said bar, a second pinion adjustably mounted. in said frame to engage the lower edge of said bar, and means for supporting said bar inthe rear of said pinions, substantially as described.

3. In a tunneling device, the combination of a tunnel-bar having racks upon its upper and lower edges, a frame, two sets of pinions adjustably mounted in said frame in position to engage the rack upon the Lipper edge of said bar at different points thereon, and two pinions adjustably mounted in said frame in position to engage the lower edge of said bar at different points thereon, substantially as described.

4. In a tunneling device, the combination of a tunnel-bar having racks upon its upper and lower edges, a frame, two pinions mounted in said frame in position to engage the rack upon the upper edge of said bar at different points thereon, two pinions mounted in said frame in position to engage the lower edge of said bar at different points thereon, and means for separately adjusting said pinions, substantially as described.

5. In a tunneling device, the combination of a frame, having cross-beams of sufiicient length to span a track for a mine-car, jacks near the ends of said beams for independently adjusting the same in a vertical direction, said jacks being located at a suiiicient distance apart to receive a mine-car therebetween, means cooperating with said jacks for securing said frame in the tunnel, a tunnel-bar, and a rackand-pinion device for controlling said tunnelbar, substantially as described.

6. In a tunneling device, the combination of a frame, having cross-beams of sufiicient length to span a track for a mine-.can jacks near. the ends of said beams for independently adjust- IOC IIC

ently-adjustable supports which engage the upper and lower edges thereof mounted in said frame, means for clamping said bar beLV tween said supports whereby said tunnel-barmay be radially and rectilineally adjusted, and supports for holdingsaid frame in position, substantially as described.

In witness whereof I have hereunto subscribed-my name in the presence of two witnesses.

GEORGE W. JACKSON.

Witnesses:

ALFRED SLADE, Y CoRNELIUs HOGAN.` 

